{"product_id":"holley-efi-terminator-x-max-2003-2006-gen-iii-hemi-550-1421","title":"Holley EFI Terminator X Max Gen III HEMI EFI System: Fits Most Chrysler \/ Dodge Models (2003-2015)","description":"\u003ch3\u003eHolley EFI Terminator X Max Gen III HEMI EFI System\u003c\/h3\u003e\u003cp\u003e2003–2006 Chrysler 5.7L \/ 6.1L \/ 6.4L GEN III HEMI Engines\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e550-1421\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI System is a comprehensive engine management solution designed specifically for Chrysler GEN III HEMI engines from 2003 to 2006, including the 5.7L, 6.1L, and 6.4L variants equipped with the factory Drive-by-Wire throttle body (non-VVT). This advanced EFI system delivers precise fuel and ignition control, real-time fuel learning, and extensive tuning capabilities, making it ideal for enthusiasts seeking reliable, high-performance engine management without the complexity of traditional carburetion.\u003c\/p\u003e\u003cp\u003eWhether you are upgrading a street-driven muscle car or building a track-ready race machine, the Terminator X Max offers a plug-and-play solution that simplifies installation and accelerates your tuning process. Its intuitive 3.5\" touchscreen handheld and included Holley EFI software provide both beginner-friendly calibration wizards and advanced laptop tuning options, ensuring you have full control over your engine’s performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned to maximize the potential of your GEN III HEMI, the Terminator X Max includes a host of features engineered for flexibility, precision, and ease of use:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePlug-and-play compatibility with 2003–2006 Chrysler 5.7L, 6.1L, and 6.4L GEN III HEMI engines using factory Drive-by-Wire throttle bodies (non-VVT only)\u003c\/li\u003e\n\u003cli\u003eHigh impedance injector drivers supporting Holley EFI and most stock injectors (does not support low impedance injectors)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bosch LSU 4.9 wideband O2 sensors for accurate air\/fuel ratio monitoring and closed-loop tuning\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor with option to disable for external MAP sensor use on boosted applications\u003c\/li\u003e\n\u003cli\u003eFour programmable inputs and outputs for electric fans, boost control solenoids, nitrous activation, and more\u003c\/li\u003e\n\u003cli\u003eAdvanced boost control options including boost vs. time, gear, RPM, and speed with built-in safeties\u003c\/li\u003e\n\u003cli\u003eComprehensive nitrous control channels supporting wet\/dry, progressive\/non-progressive setups with rich\/lean safeties\u003c\/li\u003e\n\u003cli\u003eMultiple advanced tuning tables including 1D and 2D maps for fuel, spark, and boost management\u003c\/li\u003e\n\u003cli\u003eCompact ECU design (7.45” x 4.1” x 1.66”) for versatile mounting locations\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld with calibration wizard, data logging, and customizable gauge displays\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software for full laptop control and advanced tuning capabilities\u003c\/li\u003e\n\u003cli\u003ePlug-and-play compatibility with Holley EFI accessories such as gauges, shift lights, and digital\/pro dashes (P\/N 553-106, 553-111, 553-112)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max ECU is engineered with a compact, rugged enclosure designed to withstand the harsh automotive environment while providing flexible mounting options. The system integrates high-quality Bosch wideband O2 sensors and a reliable 1 bar MAP sensor to ensure precise engine monitoring. The included EV6 injector harness and vacuum hose adapters (1\/8”, 1\/4”, and 3\/16”) facilitate seamless integration with factory components, minimizing installation complexity.\u003c\/p\u003e\u003cp\u003eHolley’s focus on user-friendly design is evident in the intuitive touchscreen handheld controller, which offers quick access to tuning parameters, real-time data, and diagnostic LEDs that provide instant feedback on critical engine functions such as ECU power, engine run status, TPS calibration, and cam signal detection.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Terminator X Max EFI system is a direct plug-and-play solution for 2003–2006 Chrysler GEN III HEMI engines equipped with factory Drive-by-Wire throttle bodies (non-VVT). Installation requires no major modifications, as the system includes all necessary wiring harnesses and adapters to connect with stock injectors and sensors. The compact ECU can be mounted in a variety of locations, but it is important to orient the diagnostic LEDs facing upward for proper visibility.\u003c\/p\u003e\u003cp\u003eFor boosted applications, the internal MAP sensor can be disabled to accommodate an external MAP sensor, with a terminated connector included for easy installation. The system’s compatibility with Holley EFI accessories further simplifies integration with existing gauges and control modules.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eTerminator X Max ECU unit\u003c\/li\u003e\n\u003cli\u003e3.5” touchscreen handheld controller\u003c\/li\u003e\n\u003cli\u003eEV6 injector harness\u003c\/li\u003e\n\u003cli\u003eBosch LSU 4.9 wideband O2 sensors\u003c\/li\u003e\n\u003cli\u003eBuilt-in 1 bar MAP sensor\u003c\/li\u003e\n\u003cli\u003eVacuum hose adapters (1\/8”, 1\/4”, 3\/16” sizes)\u003c\/li\u003e\n\u003cli\u003eTerminated connector for external MAP sensor\u003c\/li\u003e\n\u003cli\u003eFree Holley EFI tuning software\u003c\/li\u003e\n\u003cli\u003eBase calibration maps for common GEN III HEMI engine combinations\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe Holley EFI Terminator X Max Gen III HEMI EFI System is perfect for enthusiasts and builders who want a reliable, easy-to-install engine management solution for their 2003–2006 Chrysler 5.7L, 6.1L, or 6.4L HEMI engines. It suits a wide range of applications from budget street builds to boosted race cars, offering advanced tuning features without the complexity or cost of standalone systems. Whether upgrading a classic muscle car or building a modern performance machine, this EFI system delivers precise control and adaptability to meet your needs.\u003c\/p\u003e","brand":"Holley EFI","offers":[{"title":"Default Title","offer_id":47315668598996,"sku":"550-1421","price":2299.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/3459_c0231dbb33572d7c0371c9d918b341a679e08ee2_80f3bc3c-2cbe-49e0-a311-d8d9bf7091b5.webp?v=1766655089","url":"https:\/\/fasthemis.com\/products\/holley-efi-terminator-x-max-2003-2006-gen-iii-hemi-550-1421","provider":"FastHemis","version":"1.0","type":"link"}